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hermes - 💡(How to fix) Fix AIAgent child construction eagerly runs auxiliary compression/provider preflight [1 participants]

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NousResearch/hermes-agent#13492•Fetched 2026-04-22 08:06:04
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Root Cause

For interrupt / delegation tests, this means a child can fail or stall before run_conversation() starts, making the test exercise auxiliary/provider preflight rather than interrupt propagation.

More broadly, it suggests AIAgent.__init__ may be doing too much eager work for contexts where a child agent should be cheap to construct and deterministic.

Fix Action

Fix / Workaround

Current workaround/fix

A minimal test fix can make the interrupt test hermetic by mocking unrelated preflight checks and pinning terminal backend env. That addresses the harness bug, but this issue tracks the deeper production seam.

RAW_BUFFERClick to expand / collapse

Problem

tests/run_agent/test_real_interrupt_subagent.py::TestRealSubagentInterrupt::test_interrupt_child_during_api_call exposed that child agent construction can be blocked by unrelated preflight work before the interrupt path is even exercised.

In practice, the suite failure manifested as a test/harness hermeticity issue, but the deeper seam is architectural: child construction can trigger _check_compression_model_feasibility() and its auxiliary/provider resolution path eagerly during AIAgent.__init__.

Why this matters

For interrupt / delegation tests, this means a child can fail or stall before run_conversation() starts, making the test exercise auxiliary/provider preflight rather than interrupt propagation.

More broadly, it suggests AIAgent.__init__ may be doing too much eager work for contexts where a child agent should be cheap to construct and deterministic.

Observed symptoms

  • suite-only behavior differed from isolated test runs
  • child never reached run_conversation() under certain orderings
  • stack traces pointed into _check_compression_model_feasibility() and auxiliary/provider resolution rather than the interrupt path

Suggested follow-up

Consider whether these checks should be:

  • lazy
  • deferred until actually needed
  • optional/skippable for delegated child agents or test-focused construction paths

Current workaround/fix

A minimal test fix can make the interrupt test hermetic by mocking unrelated preflight checks and pinning terminal backend env. That addresses the harness bug, but this issue tracks the deeper production seam.

extent analysis

TL;DR

Consider making the checks in AIAgent.__init__ lazy or deferred until actually needed to prevent child agent construction from being blocked by unrelated preflight work.

Guidance

  • Identify the specific checks in AIAgent.__init__ that are causing the issue, such as _check_compression_model_feasibility() and auxiliary/provider resolution, and consider making them lazy or deferred.
  • Determine if these checks can be made optional or skippable for delegated child agents or test-focused construction paths to improve performance and determinism.
  • Verify that the issue is resolved by running the interrupt test with the modified AIAgent.__init__ and checking that the child agent reaches run_conversation() as expected.
  • Consider implementing a workaround by mocking unrelated preflight checks and pinning terminal backend env, as described in the current workaround/fix, to make the interrupt test hermetic.

Example

class AIAgent:
    def __init__(self):
        # ... other initialization code ...
        # Make _check_compression_model_feasibility() lazy
        self._compression_model_feasibility_checked = False

    def _check_compression_model_feasibility(self):
        # ... implementation ...
        self._compression_model_feasibility_checked = True

    def run_conversation(self):
        if not self._compression_model_feasibility_checked:
            self._check_compression_model_feasibility()
        # ... rest of the method ...

Notes

The issue is specific to the AIAgent class and its initialization process, and the suggested fix is to make the checks lazy or deferred. However, the exact implementation details may vary depending on the specific requirements and constraints of the project.

Recommendation

Apply workaround: Make the checks in AIAgent.__init__ lazy or deferred until actually needed, as this addresses the deeper production seam and improves the performance and determinism of child agent construction.

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hermes - 💡(How to fix) Fix AIAgent child construction eagerly runs auxiliary compression/provider preflight [1 participants]